Fact-check ONE written guide section on the topic "{topic}" — Chain-of-Verification style, binary per claim.

SECTION (block "{block}"):
{section}

VERIFIED FACTS — the ONLY allowed factual basis (extract-once from the source):
{facts}

Procedure:
1. Decompose the section text into its ATOMIC factual claims (definitions, properties, numbers, procedure steps, causal statements). Ignore pure didactics (transitions, framing, mnemonic phrasing).
2. Worked-example passages (a concrete problem worked through in steps to a result) are DIDACTICS when they merely APPLY or ILLUSTRATE a verified fact or a provided worked example: their concretely chosen values and computed intermediates do NOT count as over-specific. Flag an example step ONLY if it contradicts the facts or smuggles in a NEW general claim not derivable from them.
3. CONTEXT sentences are DIDACTICS too, not claims: introductions and summaries that only preview/recap the section, uncontroversial general knowledge that merely places the topic (history, origin, what an adjacent well-known technology is), and paraphrases of the verified facts. Ignore them — a guide needs connective tissue. This exemption ends the moment a sentence makes a checkable statement about THIS block's own syntax, behavior or rules: that is a claim.
4. Check EACH claim INDIVIDUALLY and BINARY against the VERIFIED FACTS above: derivable from them → belegt. Not derivable, contradicting, or over-specific beyond the facts → nicht belegt. For unsupported claims set "urteil": **"falsch"** when the claim CONTRADICTS the verified facts or contradicts the section itself (e.g. a rule its own example violates); **"unbelegt"** when it is merely not derivable from the facts.
5. Do NOT search the web, do NOT use outside knowledge as EVIDENCE — a claim about the block that is true in the world but absent from the facts is still "nicht belegt".
6. When a sentence is genuinely ambiguous between context and claim → treat it as a claim (safety before cost).

Write ONLY the JSON file to: {out_path}

Format — everything supported:
{{"ok": true}}
Otherwise (ONLY unsupported claims, VERBATIM as they appear in the text — NEVER list supported ones):
{{"claims": [{{"text": "verbatim claim from the section", "grund": "why unsupported (German, short)", "urteil": "falsch|unbelegt"}}]}}
{extra}
